A. The best Option that serves as a standard URGENT ANSWER OVERDUE B. A setting, object, or person that is photographed for marketing or artistic purposes

C. A representation of reality that can be used to do tests or experiments

Question 2: What are the benefits of models? (you may select as many as are true.)

A. Models can be safer than other methods of experimentation

B. Models are exact representations of reality with no limitations

C. models can be more ethical than other methods of experimentation

D. Models can be more possible than other methods of experimentation

Question 3: Match the type of system with the example.

Hot Tea inside an insulated thermos (Closed System or Open System)

A can of Pepsi on the kitchen table (Closed System or Opened System)

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.